Lexical Definition

‎שַׁחַף‎ shachaph (shakh'-af) gull ^H:N-M
from an unused root meaning to peel, i.e. emaciate

cuckoo.

• the gull (as thin)

1) a ceremonially unclean bird
1a) cuckow, gull, seagull, sea-mew
1b) maybe an extinct bird, exact meaning unknown

Brown-Driver-Briggs

[‎שַׁ֫חַף‎] noun [masculine] probably sea-mew, gull (compare ᵐ5 ᵑ9) (from attenuated body, Thes); so Post^{Hast. DB CUCKOW} Tristr^{NHB 210 ff}; sterna fluviatilis, or tern Id^{FFP 135} M'Lean-Shipley^{Ency. Bib. ID}.; — ‎הַשָּׁ֑חַף‎ Deut 14:15 = Lev 11:16 (P), in list of unclean birds.

Brown-Driver-Briggs References